mmap_read(3) Library Functions Manual mmap_read(3)NAME
mmap_read - memory map a file for reading
SYNTAX
#include <mmap.h>
char* mmap_read(const char* filename,size_t* filesize);
DESCRIPTION
mmap_read opens filename for reading, maps the whole file into memory, closes the file, writes the length of the file to filesize and
returns a pointer to the mapped file.
The file is unmapped by the operating system if the process terminates. It can also be manually unmapped by calling munmap from
<sys/mman.h>.
If the file could not be opened or mapped, (void*)0 is returned.
SEE ALSO mmap_unmap(3)mmap_read(3)
Check Out this Related Man Page
MUNMAP(2) BSD System Calls Manual MUNMAP(2)NAME
munmap -- remove a mapping
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/mman.h>
int
munmap(void *addr, size_t len);
DESCRIPTION
The munmap() system call deletes the mappings for the specified address range, and causes further references to addresses within the range to
generate invalid memory references.
RETURN VALUES
Upon successful completion, munmap returns zero. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
munmap() will fail if:
[EINVAL] The addr parameter was not page aligned, the len parameter was negative, or some part of the region being unmapped is out-
side the valid address range for a process.
SEE ALSO madvise(2), mincore(2), mlock(2), mmap(2), mprotect(2), msync(2), getpagesize(3)STANDARDS
The munmap() function conforms to IEEE Std 1003.1b-1993 (``POSIX.1'').
HISTORY
The munmap() function first appeared in 4.4BSD.
BSD May 27, 1994 BSD